421012

421012 Assembled Washer Screw
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Datasheet. 421012 specification

Thread Class
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.

2a

Thread Direction
The direction of the thread when viewed axially. a right-hand thread winds in a clockwise direction while a left-hand thread winds in a counterclockwise direction.

RIGHT-Hand

Thread Length
A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.

0.710in. ⁓23/32"

Fastener Length
The dimension,measured along a line parallel to the longitudinal axis,from the largest bearing surface of the fastener head to the extreme opposite end,or as specifically designated for other type fasteners.

0.750in. ⁓3/4"

Head Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.

round

Head Diameter
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.

0.670in. and 0.708in.

Head Height
A measurement from the bottom to the top of the head,in distinction from depth.

0.237in. and 0.256in. ⁓17/64"

Washer Quantity
The number of washers included on the item.

1

Internal Drive Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.

cross recess type 1

Nominal Thread Diameter
The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.

0.375in. ⁓3/8"

Thread Quantity Per Inch
The number of threads on the item per linear inch measured on a line parallel to the thread axis.

16

Primary Washer Outside Diameter

0.680in. and 0.695in.

Primary Washer Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the primary washer.

flat external teeth

Primary Washer Material Thickness

0.032in. and 0.040in.

Material
The chemical compound or mechanical mixture properties of which the item is fabricated.

steel comp 1010 fastener or steel comp 1011 fastener or steel comp 1013 fastener or steel comp 1015 fastener or steel comp 1016 fastener or steel comp 1017 fastener or steel comp 1018 fastener or steel comp 1019 fastener or steel comp 1020 fastener

Surface Treatment
The metallic,nonmetallic,and/or chemical properties with which the item is plated,dipped,and/or coated.the treatment is designed to protect the surface(s) and cannot be wiped off.

cadmium or zinc

Thread Series Designator
A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.

unc

Answers.

What class is the thread series?

Unc

What material is the assembled washer screw made of ?

Steel comp 1010 fastener or steel comp 1011 fastener or steel comp 1013 fastener or steel comp 1015 fastener or steel comp 1016 fastener or steel comp 1017 fastener or steel comp 1018 fastener or steel comp 1019 fastener or steel comp 1020 fastener

What is the thread quantity per inch?

16

What is the head style?

Round

What is the thread length?

0.710 inches minimum

What is the thread direction?

Right-hand

What is the thread class?

2a

What is the NSN for 421012?

5305-00-754-4378

How is this classified for shipping?

Schedule B number: 7318152000
Bolts and bolts and their nuts or washers exported in the same shipment

What's the federal classification of 421012?

FSC 5305 ⁓ Screws

NSN 5305-00-754-4378 SCREW,ASSEMBLED WASHER

unc thread series cadmium or zinc surface treated 16 thread quantity per inch round head style 0.710" thread length right-hand 2a thread class

NIIN
007544378
NIIN Date
01/01/62
Schedule B
7318152000 
Name Code
06660
FIIG
A003B0
DEMIL / ITAR
Uncontrolled item (Code A)
Hazmat
No hazard information available from HMIRS.
MSDS
N/A
Precious Metals
No precious metals
Enviromental
N/A
Electrostatic ESD & EMI
No ESD or EMI sensitivity

Other Part Numbers Parts with same form, fit, and function by other manufacturers

Major End Users Countries and entities

  • - Republic of Korea 
  • - Turkey 

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Similar by Design Other screws with similar characteristics

Nothing similar to this part number was found in our inventory

421012 / Screw,assembled washerWhat is the formal definition of this item?

A screw, (as modified) to which has been assembled one or more nonremovable washer(s).